Richard Fitz Roy (died 1246) or de Warenne, Baron of Chilham, Kent , was the illegitimate son of King John of England. His mother was John's cousin, a daughter of Hamelin de Warenne and Isabella de Warenne, Countess of Surrey . He served in his father's army as a captain during the baronial revolt. In 1216 he was made constable of Wallingford castle.

In 1214 Richard married Rohese of Dover , daughter of Fulbert of Dover . Their children were:

1. Richard of Dover, 2nd Baron of Chilham , married Matilda, 6th Countess of Angus
2. Isabella of Dover, married 1247 Maurice de Berkeley
3. Lorette of Dover, married 1248 William Marmion

Sources

• Given-Wilson & Curteis. The Royal Bastards of Medieval England, 1995